The MOT staff are only interested in a warm car, so if it only a problem when cold....it wont be a problem by the time you get there. I would guess if you booked it in for an MOT through some one in the know, like Derek, he will know a sympathetic and understanding tester.

Hi Darren. The micro switches have a habit of failing. They are standard easy to get items that only cost a few pounds. If you carefully split the housing, you will see how simple it is. I got mine from Maplins , although they’ve gone out of business now. Still should be easy to source.

Ok so still no joy although I have sorted one thing out. Looks like when we were up at Scoff's the throttle pot wiring was connected back to front. That is to say yellow to yellow, brown to brown. Strangely the throttle pot connectors are cross wired a bit like the TDC sensor - yellow to brown, brown to yellow. This is apparent from the plastic tangs on the connector, but with age the main tab was broken and I guess Scoff wired it the logical way round.

That meant the WOT switch was still connected but the idle switch was disconnected - opposite way round to what Mr Faulks wanted.

Anyway. Regardless of that it's now the correct way round. I thought at this point I had cracked it as it started with a perfect idle of 1200 rpm and dropped quickly to approx 800 once warm. Voltage at the idle control valve was 7+volts at this stage, so much more in the range I was expecting versus the 4v I had been seeing. Stopped and restarted it and all good.

Came back the next day however and I'm not getting a clean steady idle again and back to 4v input at the ICV. I can only think that it's a feed of some sort to the idle circuit, but what and which sensor? When it did idle at 7V it was much better behaved with better pick-up than when it didn't, so I'm thinking it's also potentially not running the cold idle map.

Voltage at the throttle pot is still + / - 4.8V or so across the central pins to the outer ones.

Coolant temp sensor seems to read 300 ohms at cold. Same for the air temp sensor, with about 4.8v or so across the inputs.

Really odd. Again each time I think I've cracked it I try it again and back to the beginning. I even put on a new ICV and same result, which tallies at least with what I've seen from the input voltages and the lower values I'm again seeing......

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Formed originally for fans of the V6 Renault Alpines including the Alpine GTA V6 GT, GTA V6 Turbo, GTA Le Mans and A610. Owners of the Alpine A110, Alpine A310, Renault 5 Alpine, 5 Turbo 1 & 2, Spider, Clio V6 and all Turbo & Renaultsport vehicles built at the former Alpine factory in Dieppe are welcome and will find photographs, literature and information relating to their cars.